<?php
/*=======================================================================
 // File:        JPGRAPH_CANVTOOLS.PHP
 // Description: Some utilities for text and shape drawing on a canvas
 // Created:     2002-08-23
 // Ver:         $Id: jpgraph_canvtools.php 1857 2009-09-28 14:38:14Z ljp $
 //
 // Copyright (c) Aditus Consulting. All rights reserved.
 //========================================================================
 */

define('CORNER_TOPLEFT',0);
define('CORNER_TOPRIGHT',1);
define('CORNER_BOTTOMRIGHT',2);
define('CORNER_BOTTOMLEFT',3);


//===================================================
// CLASS CanvasScale
// Description: Define a scale for canvas so we
// can abstract away with absolute pixels
//===================================================

class CanvasScale {
	private $g;
	private $w,$h;
	private $ixmin=0,$ixmax=10,$iymin=0,$iymax=10;

	function __construct($graph,$xmin=0,$xmax=10,$ymin=0,$ymax=10) {
		$this->g = $graph;
		$this->w = $graph->img->width;
		$this->h = $graph->img->height;
		$this->ixmin = $xmin;
		$this->ixmax = $xmax;
		$this->iymin = $ymin;
		$this->iymax = $ymax;
	}

	function Set($xmin=0,$xmax=10,$ymin=0,$ymax=10) {
		$this->ixmin = $xmin;
		$this->ixmax = $xmax;
		$this->iymin = $ymin;
		$this->iymax = $ymax;
	}

	function Get() {
		return array($this->ixmin,$this->ixmax,$this->iymin,$this->iymax);
	}

	function Translate($x,$y) {
		$xp = round(($x-$this->ixmin)/($this->ixmax - $this->ixmin) * $this->w);
		$yp = round(($y-$this->iymin)/($this->iymax - $this->iymin) * $this->h);
		return array($xp,$yp);
	}

	function TranslateX($x) {
		$xp = round(($x-$this->ixmin)/($this->ixmax - $this->ixmin) * $this->w);
		return $xp;
	}

	function TranslateY($y) {
		$yp = round(($y-$this->iymin)/($this->iymax - $this->iymin) * $this->h);
		return $yp;
	}

}


//===================================================
// CLASS Shape
// Description: Methods to draw shapes on canvas
//===================================================
class Shape {
	private $img,$scale;

	function __construct($aGraph,$scale) {
		$this->img = $aGraph->img;
		$this->img->SetColor('black');
		$this->scale = $scale;
	}

	function SetColor($aColor) {
		$this->img->SetColor($aColor);
	}

	function Line($x1,$y1,$x2,$y2) {
		list($x1,$y1) = $this->scale->Translate($x1,$y1);
		list($x2,$y2) = $this->scale->Translate($x2,$y2);
		$this->img->Line($x1,$y1,$x2,$y2);
	}

	function SetLineWeight($aWeight) {
		$this->img->SetLineWeight($aWeight);
	}

	function Polygon($p,$aClosed=false) {
		$n=count($p);
		for($i=0; $i < $n; $i+=2 ) {
			$p[$i]   = $this->scale->TranslateX($p[$i]);
			$p[$i+1] = $this->scale->TranslateY($p[$i+1]);
		}
		$this->img->Polygon($p,$aClosed);
	}

	function FilledPolygon($p) {
		$n=count($p);
		for($i=0; $i < $n; $i+=2 ) {
			$p[$i]   = $this->scale->TranslateX($p[$i]);
			$p[$i+1] = $this->scale->TranslateY($p[$i+1]);
		}
		$this->img->FilledPolygon($p);
	}


	// Draw a bezier curve with defining points in the $aPnts array
	// using $aSteps steps.
	// 0=x0, 1=y0
	// 2=x1, 3=y1
	// 4=x2, 5=y2
	// 6=x3, 7=y3
	function Bezier($p,$aSteps=40) {
		$x0 = $p[0];
		$y0 = $p[1];
		// Calculate coefficients
		$cx = 3*($p[2]-$p[0]);
		$bx = 3*($p[4]-$p[2])-$cx;
		$ax = $p[6]-$p[0]-$cx-$bx;
		$cy = 3*($p[3]-$p[1]);
		$by = 3*($p[5]-$p[3])-$cy;
		$ay = $p[7]-$p[1]-$cy-$by;

		// Step size
		$delta = 1.0/$aSteps;

		$x_old = $x0;
		$y_old = $y0;
		for($t=$delta; $t<=1.0; $t+=$delta) {
			$tt = $t*$t; $ttt=$tt*$t;
			$x  = $ax*$ttt + $bx*$tt + $cx*$t + $x0;
			$y = $ay*$ttt + $by*$tt + $cy*$t + $y0;
			$this->Line($x_old,$y_old,$x,$y);
			$x_old = $x;
			$y_old = $y;
		}
		$this->Line($x_old,$y_old,$p[6],$p[7]);
	}

	function Rectangle($x1,$y1,$x2,$y2) {
		list($x1,$y1) = $this->scale->Translate($x1,$y1);
		list($x2,$y2)   = $this->scale->Translate($x2,$y2);
		$this->img->Rectangle($x1,$y1,$x2,$y2);
	}

	function FilledRectangle($x1,$y1,$x2,$y2) {
		list($x1,$y1) = $this->scale->Translate($x1,$y1);
		list($x2,$y2)   = $this->scale->Translate($x2,$y2);
		$this->img->FilledRectangle($x1,$y1,$x2,$y2);
	}

	function Circle($x1,$y1,$r) {
		list($x1,$y1) = $this->scale->Translate($x1,$y1);
		if( $r >= 0 )
		$r   = $this->scale->TranslateX($r);
		else
		$r = -$r;
		$this->img->Circle($x1,$y1,$r);
	}

	function FilledCircle($x1,$y1,$r) {
		list($x1,$y1) = $this->scale->Translate($x1,$y1);
		if( $r >= 0 )
		$r   = $this->scale->TranslateX($r);
		else
		$r = -$r;
		$this->img->FilledCircle($x1,$y1,$r);
	}

	function RoundedRectangle($x1,$y1,$x2,$y2,$r=null) {
		list($x1,$y1) = $this->scale->Translate($x1,$y1);
		list($x2,$y2)   = $this->scale->Translate($x2,$y2);

		if( $r == null )
		$r = 5;
		elseif( $r >= 0 )
		$r = $this->scale->TranslateX($r);
		else
		$r = -$r;
		$this->img->RoundedRectangle($x1,$y1,$x2,$y2,$r);
	}

	function FilledRoundedRectangle($x1,$y1,$x2,$y2,$r=null) {
		list($x1,$y1) = $this->scale->Translate($x1,$y1);
		list($x2,$y2)   = $this->scale->Translate($x2,$y2);

		if( $r == null )
		$r = 5;
		elseif( $r > 0 )
		$r = $this->scale->TranslateX($r);
		else
		$r = -$r;
		$this->img->FilledRoundedRectangle($x1,$y1,$x2,$y2,$r);
	}

	function ShadowRectangle($x1,$y1,$x2,$y2,$fcolor=false,$shadow_width=null,$shadow_color=array(102,102,102)) {
		list($x1,$y1) = $this->scale->Translate($x1,$y1);
		list($x2,$y2) = $this->scale->Translate($x2,$y2);
		if( $shadow_width == null )
		$shadow_width=4;
		else
		$shadow_width=$this->scale->TranslateX($shadow_width);
		$this->img->ShadowRectangle($x1,$y1,$x2,$y2,$fcolor,$shadow_width,$shadow_color);
	}

	function SetTextAlign($halign,$valign="bottom") {
		$this->img->SetTextAlign($halign,$valign="bottom");
	}

	function StrokeText($x1,$y1,$txt,$dir=0,$paragraph_align="left") {
		list($x1,$y1) = $this->scale->Translate($x1,$y1);
		$this->img->StrokeText($x1,$y1,$txt,$dir,$paragraph_align);
	}

	// A rounded rectangle where one of the corner has been moved "into" the
	// rectangle 'iw' width and 'ih' height. Corners:
	// 0=Top left, 1=top right, 2=bottom right, 3=bottom left
	function IndentedRectangle($xt,$yt,$w,$h,$iw=0,$ih=0,$aCorner=3,$aFillColor="",$r=4) {

		list($xt,$yt) = $this->scale->Translate($xt,$yt);
		list($w,$h)   = $this->scale->Translate($w,$h);
		list($iw,$ih) = $this->scale->Translate($iw,$ih);

		$xr = $xt + $w - 0;
		$yl = $yt + $h - 0;

		switch( $aCorner ) {
			case 0: // Upper left
				 
				// Bottom line, left &  right arc
				$this->img->Line($xt+$r,$yl,$xr-$r,$yl);
				$this->img->Arc($xt+$r,$yl-$r,$r*2,$r*2,90,180);
				$this->img->Arc($xr-$r,$yl-$r,$r*2,$r*2,0,90);

				// Right line, Top right arc
				$this->img->Line($xr,$yt+$r,$xr,$yl-$r);
				$this->img->Arc($xr-$r,$yt+$r,$r*2,$r*2,270,360);

				// Top line, Top left arc
				$this->img->Line($xt+$iw+$r,$yt,$xr-$r,$yt);
				$this->img->Arc($xt+$iw+$r,$yt+$r,$r*2,$r*2,180,270);

				// Left line
				$this->img->Line($xt,$yt+$ih+$r,$xt,$yl-$r);

				// Indent horizontal, Lower left arc
				$this->img->Line($xt+$r,$yt+$ih,$xt+$iw-$r,$yt+$ih);
				$this->img->Arc($xt+$r,$yt+$ih+$r,$r*2,$r*2,180,270);

				// Indent vertical, Indent arc
				$this->img->Line($xt+$iw,$yt+$r,$xt+$iw,$yt+$ih-$r);
				$this->img->Arc($xt+$iw-$r,$yt+$ih-$r,$r*2,$r*2,0,90);

				if( $aFillColor != '' ) {
					$bc = $this->img->current_color_name;
					$this->img->PushColor($aFillColor);
					$this->img->FillToBorder($xr-$r,$yl-$r,$bc);
					$this->img->PopColor();
				}

				break;

			case 1: // Upper right

				// Bottom line, left &  right arc
				$this->img->Line($xt+$r,$yl,$xr-$r,$yl);
				$this->img->Arc($xt+$r,$yl-$r,$r*2,$r*2,90,180);
				$this->img->Arc($xr-$r,$yl-$r,$r*2,$r*2,0,90);

				// Left line, Top left arc
				$this->img->Line($xt,$yt+$r,$xt,$yl-$r);
				$this->img->Arc($xt+$r,$yt+$r,$r*2,$r*2,180,270);

				// Top line, Top right arc
				$this->img->Line($xt+$r,$yt,$xr-$iw-$r,$yt);
				$this->img->Arc($xr-$iw-$r,$yt+$r,$r*2,$r*2,270,360);

				// Right line
				$this->img->Line($xr,$yt+$ih+$r,$xr,$yl-$r);

				// Indent horizontal, Lower right arc
				$this->img->Line($xr-$iw+$r,$yt+$ih,$xr-$r,$yt+$ih);
				$this->img->Arc($xr-$r,$yt+$ih+$r,$r*2,$r*2,270,360);

				// Indent vertical, Indent arc
				$this->img->Line($xr-$iw,$yt+$r,$xr-$iw,$yt+$ih-$r);
				$this->img->Arc($xr-$iw+$r,$yt+$ih-$r,$r*2,$r*2,90,180);

				if( $aFillColor != '' ) {
					$bc = $this->img->current_color_name;
					$this->img->PushColor($aFillColor);
					$this->img->FillToBorder($xt+$r,$yl-$r,$bc);
					$this->img->PopColor();
				}

				break;

			case 2: // Lower right
				// Top line, Top left & Top right arc
				$this->img->Line($xt+$r,$yt,$xr-$r,$yt);
				$this->img->Arc($xt+$r,$yt+$r,$r*2,$r*2,180,270);
				$this->img->Arc($xr-$r,$yt+$r,$r*2,$r*2,270,360);

				// Left line, Bottom left arc
				$this->img->Line($xt,$yt+$r,$xt,$yl-$r);
				$this->img->Arc($xt+$r,$yl-$r,$r*2,$r*2,90,180);

				// Bottom line, Bottom right arc
				$this->img->Line($xt+$r,$yl,$xr-$iw-$r,$yl);
				$this->img->Arc($xr-$iw-$r,$yl-$r,$r*2,$r*2,0,90);

				// Right line
				$this->img->Line($xr,$yt+$r,$xr,$yl-$ih-$r);
				 
				// Indent horizontal, Lower right arc
				$this->img->Line($xr-$r,$yl-$ih,$xr-$iw+$r,$yl-$ih);
				$this->img->Arc($xr-$r,$yl-$ih-$r,$r*2,$r*2,0,90);

				// Indent vertical, Indent arc
				$this->img->Line($xr-$iw,$yl-$r,$xr-$iw,$yl-$ih+$r);
				$this->img->Arc($xr-$iw+$r,$yl-$ih+$r,$r*2,$r*2,180,270);

				if( $aFillColor != '' ) {
					$bc = $this->img->current_color_name;
					$this->img->PushColor($aFillColor);
					$this->img->FillToBorder($xt+$r,$yt+$r,$bc);
					$this->img->PopColor();
				}

				break;

			case 3: // Lower left
				// Top line, Top left & Top right arc
				$this->img->Line($xt+$r,$yt,$xr-$r,$yt);
				$this->img->Arc($xt+$r,$yt+$r,$r*2,$r*2,180,270);
				$this->img->Arc($xr-$r,$yt+$r,$r*2,$r*2,270,360);

				// Right line, Bottom right arc
				$this->img->Line($xr,$yt+$r,$xr,$yl-$r);
				$this->img->Arc($xr-$r,$yl-$r,$r*2,$r*2,0,90);

				// Bottom line, Bottom left arc
				$this->img->Line($xt+$iw+$r,$yl,$xr-$r,$yl);
				$this->img->Arc($xt+$iw+$r,$yl-$r,$r*2,$r*2,90,180);

				// Left line
				$this->img->Line($xt,$yt+$r,$xt,$yl-$ih-$r);
				 
				// Indent horizontal, Lower left arc
				$this->img->Line($xt+$r,$yl-$ih,$xt+$iw-$r,$yl-$ih);
				$this->img->Arc($xt+$r,$yl-$ih-$r,$r*2,$r*2,90,180);

				// Indent vertical, Indent arc
				$this->img->Line($xt+$iw,$yl-$ih+$r,$xt+$iw,$yl-$r);
				$this->img->Arc($xt+$iw-$r,$yl-$ih+$r,$r*2,$r*2,270,360);

				if( $aFillColor != '' ) {
					$bc = $this->img->current_color_name;
					$this->img->PushColor($aFillColor);
					$this->img->FillToBorder($xr-$r,$yt+$r,$bc);
					$this->img->PopColor();
				}

				break;
		}
	}
}


//===================================================
// CLASS RectangleText
// Description: Draws a text paragraph inside a
// rounded, possible filled, rectangle.
//===================================================
class CanvasRectangleText {
	private $ix,$iy,$iw,$ih,$ir=4;
	private $iTxt,$iColor='black',$iFillColor='',$iFontColor='black';
	private $iParaAlign='center';
	private $iAutoBoxMargin=5;
	private $iShadowWidth=3,$iShadowColor='';

	function __construct($aTxt='',$xl=0,$yt=0,$w=0,$h=0) {
		$this->iTxt = new Text($aTxt);
		$this->ix = $xl;
		$this->iy = $yt;
		$this->iw = $w;
		$this->ih = $h;
	}

	function SetShadow($aColor='gray',$aWidth=3) {
		$this->iShadowColor = $aColor;
		$this->iShadowWidth = $aWidth;
	}

	function SetFont($FontFam,$aFontStyle,$aFontSize=12) {
		$this->iTxt->SetFont($FontFam,$aFontStyle,$aFontSize);
	}

	function SetTxt($aTxt) {
		$this->iTxt->Set($aTxt);
	}

	function ParagraphAlign($aParaAlign) {
		$this->iParaAlign = $aParaAlign;
	}

	function SetFillColor($aFillColor) {
		$this->iFillColor = $aFillColor;
	}

	function SetAutoMargin($aMargin) {
		$this->iAutoBoxMargin=$aMargin;
	}

	function SetColor($aColor) {
		$this->iColor = $aColor;
	}

	function SetFontColor($aColor) {
		$this->iFontColor = $aColor;
	}

	function SetPos($xl=0,$yt=0,$w=0,$h=0) {
		$this->ix = $xl;
		$this->iy = $yt;
		$this->iw = $w;
		$this->ih = $h;
	}

	function Pos($xl=0,$yt=0,$w=0,$h=0) {
		$this->ix = $xl;
		$this->iy = $yt;
		$this->iw = $w;
		$this->ih = $h;
	}

	function Set($aTxt,$xl,$yt,$w=0,$h=0) {
		$this->iTxt->Set($aTxt);
		$this->ix = $xl;
		$this->iy = $yt;
		$this->iw = $w;
		$this->ih = $h;
	}

	function SetCornerRadius($aRad=5) {
		$this->ir = $aRad;
	}

	function Stroke($aImg,$scale) {

		// If coordinates are specifed as negative this means we should
		// treat them as abolsute (pixels) coordinates
		if( $this->ix > 0 ) {
			$this->ix = $scale->TranslateX($this->ix) ;
		}
		else {
			$this->ix = -$this->ix;
		}

		if( $this->iy > 0 ) {
			$this->iy = $scale->TranslateY($this->iy) ;
		}
		else {
			$this->iy = -$this->iy;
		}
		 
		list($this->iw,$this->ih) = $scale->Translate($this->iw,$this->ih) ;

		if( $this->iw == 0 )
		$this->iw = round($this->iTxt->GetWidth($aImg) + $this->iAutoBoxMargin);
		if( $this->ih == 0 ) {
			$this->ih = round($this->iTxt->GetTextHeight($aImg) + $this->iAutoBoxMargin);
		}

		if( $this->iShadowColor != '' ) {
			$aImg->PushColor($this->iShadowColor);
			$aImg->FilledRoundedRectangle($this->ix+$this->iShadowWidth,
			$this->iy+$this->iShadowWidth,
			$this->ix+$this->iw-1+$this->iShadowWidth,
			$this->iy+$this->ih-1+$this->iShadowWidth,
			$this->ir);
			$aImg->PopColor();
		}

		if( $this->iFillColor != '' ) {
			$aImg->PushColor($this->iFillColor);
			$aImg->FilledRoundedRectangle($this->ix,$this->iy,
			$this->ix+$this->iw-1,
			$this->iy+$this->ih-1,
			$this->ir);
			$aImg->PopColor();
		}

		if( $this->iColor != '' ) {
			$aImg->PushColor($this->iColor);
			$aImg->RoundedRectangle($this->ix,$this->iy,
			$this->ix+$this->iw-1,
			$this->iy+$this->ih-1,
			$this->ir);
			$aImg->PopColor();
		}

		$this->iTxt->Align('center','center');
		$this->iTxt->ParagraphAlign($this->iParaAlign);
		$this->iTxt->SetColor($this->iFontColor);
		$this->iTxt->Stroke($aImg, $this->ix+$this->iw/2, $this->iy+$this->ih/2);

		return array($this->iw, $this->ih);

	}

}


?>